Boiler



Aug. 2 5, 1925.

L. C. LOEWENSTEIN ET AL.

BOILER Filed Oct. 28, 1919 2 Sheets-Sheet, 1

Inventor-s Louis C.| oeWer-|steir-| Harvey N Davis Theirflttor-ney L. C. LOEWENSTEIN ET AL Aug. 25, 1925.

BOILER Filed Oct 28, 1919 2 Sheets-Sheet 2 Fig). 6.

I nventors,

Louis C. Loewenstein, Harvey NOavis, WMQ

' Their'fittol-ney.

Patented Aug. 25, 1925.

UNITED STATES PATIENT emu-1.:

Louis c. LOEWENSTEIN, or LYNN, AND HARVEY N. DAVIS, or CAMBRIDGE, massn- "cnusn'rrs, ASSIGNORS 'ro GENERAL ELECTRIC COMPANY, A CORPORATION or --Nr :w YORK.

BOILER.

Application filed October 28, 1919. Serial No. 333,998.-

To all whomt't may concern: I

Be it known that we, LOUIS C. LonwnN- STEIN, a citizen of the United ,States, residing at Lynn, county of Essex, State of Massachusetts, and HARVEY N. DAVIS, a citizen of the United" States, residing at Cambridge, county of Middlesex, State of Massachusetts, havednvented certain new and useful Improvements inBoilers, of which the followingis a. specification.

The present invention relates to boilers, especially to those intended for vaporizing fluid having a hi h boiling point with respect to water an more especially to heavy fluids,*such as mercuryfor example.

' The object of our invention is to provide an improved construction and arrangement in a'boiler of this character; and, for a consideration of what we believe to be novel and our invention, attention is directed to the accompanying description and the claims appended thereto.

In the drawing, Fig. 1 is a front elevation I of a boiler embodying our invention, walls at certain points being broken away to better illustrate the structure; Fig. 2 is a side view of a part of the boiler; Fig. 3 is a top plan view on af larger scale than Fig. 1 of a part of the boiler, part of a top wall being broken away; Fig. 1 is a section taken on l ne 4-4, Fig. 1; Fig. 5 is a section taken on l ne 5--5, Fig. 1; Fig. 6 is a section taken on l ne 6-6, Fig. 1; Fig. 7 is a section taken on line 77, Fig. 1; Fig 8 is a section taken on line 8-8, Fig. 1; Fig. 9 isa section taken on line'99, Fig. 1; and Fig. 10 is a section taken on line 10-10, Fig 1. A One particular application of our mercury boiler isin connection with a. power generating system in which mercury'vapor is used to drive a turbine or other prime mover, and the exhaust mercury vapor therefrom employedto generate steam from water which in turn is supplied to a turbine or other prime mover preferably of the condensing type, said turbines driving electric generators or convenience the boiler described as a mercury 59 course be understood that it is not limite necessarily to use with mercury.

Referring to the drawing, the prises a plurality of grids or cells 15 which will be particularly other apparatus Hereinafter for boiler but it will of.

d of tube sheet 2% is shown in plan in Fig. 3,

boiler comare suitably supported in spaced relation to each other in an enclosing casing and be tween which the flue gases pass. The grids are all alike and each comprises two thin sheets of metal 16 and 17 slightly. separated to form a liquid space and a vapor space between them. The sheets are sealed or fastened together around their edges, as by welding them together, except where the liquid enters and the vapors are discharged;

and they are supported in spaced relation to each other by providing a plurality of projections on one or both sheets and spot welding them as indicated at 18. The spot welds may be distributed as found desirable to give the necessary strength and rigidity. In order to directthe circulation of mercury and mercury vapor between the sheets of each grid, partitions as indicated at 19 and 20 (see Fig. 1) are provided which cause the mercury and mercury vapors to follow a path as indicated by the dotted arrows in Fig. 1. As arranged, the liquid mercury enters the grid at each of its lower corners and is caused to flow along the bottom of the grid beneath the horizontal parts of partitions 19; and, as vapor is formed, it flows. upward at the center of the grid until it meets the horizontal parts of partitions 20. The vapor is then directed downward and flows under the bottom edges of partition 20 and thence upward again to the point of escape. Along each' vertical edge of the grid is a mercury passage 21 formed by making a corrugation -or cone shaped groove 22 along each edge of one sheet, as the sheet 17, and welding the edge of the other sheet 16 over the open side of these corrugations.

ends

the slots in it through which vapor enters from the cells being indicated at 24;. From vapor header 25 a conduit 26 leads to a This is best shown in Figs. 4, 5 and 9. At their lower mercury turbine or other prime mover and serves to convey vapor -from the header to the turbine. The boiler comprises a number of grids or cells as just described, placed side by side and supported at their upper corners by rods 27, the grids being'provided with ears is located beneath plate 30 so t' at the hot products of combustion may pass from the tire box l1! between the grids. At the top oil the gris at each side of? vapor header 25 the spaces between the grids are closed by suitable flanges 32 (Fig. 8) and by a coveripg of heat insulating material 33..

' The general "construction oi grid and boiler so liar described is more particularly described and is claimed in our co-pending application Serial No. 28 1,3533, tiled March 22, 1919, and patented April it, i925, Patent No. 1,533,706.

New in a boiler of this type it is clear only a small amount of liquid is contained n the grids at a time and it successiul operation is to be obtained there must be rapid circulation or such liquid to carry P away heat from the due gases and also rapid circulation and good distribution of the due gases to heat as evenly as possible the entire surfaces of the grids. Particularly it is important that there be no pockets where due gases can stagnate.

' More particularly the object of our present invention is to provide an improved structure and arrangement will insure a rapid circulation and even distribution of the due gases, and to this end we provide each grid with corrugations so arranged that a number of passages preferably diamond-shaped in cross section are provided. The passages are formed by placing the cor rugated grids together in such manner that the edges of the corrugations engage each other, as is obvious from an inspection of the drawing. The corrugations are also preferably so arranged that the due ases ilow upward at the central portion or the boiler; thence laterally across the top of the sides thereof. and then down again at the sides out. From an inspection of Fig. I. it will seen that as regards the dew of due gasses this arrangement in substance divides the boiler into right hand and left hand sides. The blue gases entering the boiler through opening flow upward through vertical passages otl igs. l, l, 5 it} then laterally through passages so (Figs. 1 and 8} and then down through passages 37 (Figs. 1 and l) to the bottom of the boiler. At the bottom of the boiler passages 37 turn laterally as indicated at 38 (Figs. 1 and 5) and the line gases pass out through openings 39 formed between coneshaped grooves 22 (Figs. 1, 2 and [5).

lt will thus be seen that we provide definite paths for the line gases and that they will be drawn through these paths without danger of gas poclrets or points of? inactive flow being established.

'lhe mercury or other iiuid to be vaporized flows from headers E3 down through passages 21, which form in substance pro heaters for the mercury, to enter the grids at the bottoms through the passages as best shown in, Fig. 9 and then follows the course already described and indicated b the dotted arrows arriving at header 25 in the form or superheated vapor.

ill?

In accordance with the provisions of they patent statutes, we have described the principle of operation or our invention, together with the apparatus which we now consider to represent the best embodiment thereof, but we desire to have understood that the apparatus shown is only illustrative and that the invention he carried out by other means. i

What 1 claim as new and desire to secure by letters Patent of the United States, is

A boiler comprising a plurality of space grids each comprising two thin metal sheets united along their edges, partition means between the sheets each grid for directing the of liquid and vapors, said sheets being corrugated and arrahged in nested relation to each other and slightly spaced apart to form a liquid space or srnsll capacity, and said grids being arranged with the edges of the corrugations of cent grids in contact to thereby form paths for the passage of? the due gases; 4

2. A boiler comprising a plurality of spaced grids each comprising two thin metal sheets united along their edges, said sheets being corrugated vertically and transversely and arranged in nested relation to eeca other andslightly spaced apart to form a liquid space or small capacity, said grids being arranged with the edges oi. adgacent grids in contact to thereby form paths for the passage of flue gases, which paths conduct the this gases first upwardly, the laterally and then downwardly.

3. A boiler comprising a plurality oi spaced grids each comprising sheets of metal united along their edges, partition rneans between the sheets of each grid for directing the flow oi. liquid and vapors, said grids being corrugated and arranged the edges of the corrugations in contact to torus paths torthe passage of ilue a header-for supplying to the boiler,

and a header for receiving vapors therefrom. v

4. A boiler comprising a pluralit of spaced grids each comprising two thin s eets of metal united along their edges, said grids as a whole being corrugated so the sheets of each grid are equally spaced apart, and said grids being arranged with the edges of the corrugations in contact to 'form paths for the passage of the flue gases, said corrugations eing disposed vertlcally and laterally. so

that a plurality of parallel paths are provided which conduct the flue gases first vertically upward at the center of the boiler, then laterally in each direction to the sides of the boiler, and then downward along the sides of the boiler.

In witness whereof, Loms C. LOEWEN- STEIN has set his hand this 21st day of Octoher 1919, and HARVEY N. DAVIS has set his 20 hand this24th day of October 1919.

LOUIS e. LOEWENSTEIN. HARVEY N. DAVIS. 

